[cinttypes.syn] Add missing 'the', capitalize sentence

Author: tkoeppe

source/iostreams.tex

@@ -15004,15 +15004,13 @@
 \indexlibrary{\idxhdr{inttypes.h}}%
 \indextext{\idxhdr{cinttypes}}%
 \indexlibrary{\idxhdr{cinttypes}}%
-The contents and meaning of header \tcode{<cinttypes>}
+The contents and meaning of the header \tcode{<cinttypes>}
 are the same as the C standard library header \tcode{<inttypes.h>},
 with the following changes:
-
 \begin{itemize}
 \item
-the header \tcode{<cinttypes>} includes the header \tcode{<cstdint>} instead
+The header \tcode{<cinttypes>} includes the header \tcode{<cstdint>} instead
 of \tcode{<stdint.h>}, and
-
 \item
 if and only if the type \tcode{intmax_t} designates an extended integer 
 type~(\ref{basic.fundamental}), the following function signatures are added: